The stopping potential for electrons emitted from a photosensitive surface illuminated by light of wavelength 491 nm is 0.710 V. When the incident wavelength is changed to a new value, the stopping potential is 1.43V. The new wavelength is

Maximum wavelength of light source such that photoelectron can be ejected from material of work function 3 eV is

In a photoelectric experiment, frequency f = 1.5f₀ (f₀ : threshold frequency). If the frequency of light is changed to f/2, then photocurrent becomes (intensity of light has doubled)

A photocell works on the principle of

The work function of a metal is w₀ and l is wavelength of incident radiation. There is no emission of photoelectron when

The work function of a metal is w0 and $$ $\lambda$ is wavelength of incident radiation. There is no emission of photoelectron when